sys/amd64/include/cpufunc.h

   1 /*-
   2  * Copyright (c) 2003 Peter Wemm.
   3  * Copyright (c) 1993 The Regents of the University of California.
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 4. Neither the name of the University nor the names of its contributors
  15  *    may be used to endorse or promote products derived from this software
  16  *    without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  28  * SUCH DAMAGE.
  29  *
  30  * $FreeBSD$
  31  */
  32
  33 /*
  34  * Functions to provide access to special i386 instructions.
  35  * This in included in sys/systm.h, and that file should be
  36  * used in preference to this.
  37  */
  38
  39 #ifndef _MACHINE_CPUFUNC_H_
  40 #define _MACHINE_CPUFUNC_H_
  41
  42 #ifndef _SYS_CDEFS_H_
  43 #error this file needs sys/cdefs.h as a prerequisite
  44 #endif
  45
  46 struct region_descriptor;
  47
  48 #define readb(va)       (*(volatile u_int8_t *) (va))
  49 #define readw(va)       (*(volatile u_int16_t *) (va))
  50 #define readl(va)       (*(volatile u_int32_t *) (va))
  51 #define readq(va)       (*(volatile u_int64_t *) (va))
  52
  53 #define writeb(va, d)   (*(volatile u_int8_t *) (va) = (d))
  54 #define writew(va, d)   (*(volatile u_int16_t *) (va) = (d))
  55 #define writel(va, d)   (*(volatile u_int32_t *) (va) = (d))
  56 #define writeq(va, d)   (*(volatile u_int64_t *) (va) = (d))
  57
  58 #if defined(__GNUCLIKE_ASM) && defined(__CC_SUPPORTS___INLINE)
  59
  60 static __inline void
  61 breakpoint(void)
  62 {
  63         __asm __volatile("int $3");
  64 }
  65
  66 static __inline u_int
  67 bsfl(u_int mask)
  68 {
  69         u_int   result;
  70
  71         __asm __volatile("bsfl %1,%0" : "=r" (result) : "rm" (mask));
  72         return (result);
  73 }
  74
  75 static __inline u_long
  76 bsfq(u_long mask)
  77 {
  78         u_long  result;
  79
  80         __asm __volatile("bsfq %1,%0" : "=r" (result) : "rm" (mask));
  81         return (result);
  82 }
  83
  84 static __inline u_int
  85 bsrl(u_int mask)
  86 {
  87         u_int   result;
  88
  89         __asm __volatile("bsrl %1,%0" : "=r" (result) : "rm" (mask));
  90         return (result);
  91 }
  92
  93 static __inline u_long
  94 bsrq(u_long mask)
  95 {
  96         u_long  result;
  97
  98         __asm __volatile("bsrq %1,%0" : "=r" (result) : "rm" (mask));
  99         return (result);
 100 }
 101
 102 static __inline void
 103 disable_intr(void)
 104 {
 105         __asm __volatile("cli" : : : "memory");
 106 }
 107
 108 static __inline void
 109 do_cpuid(u_int ax, u_int *p)
 110 {
 111         __asm __volatile("cpuid"
 112                          : "=a" (p[0]), "=b" (p[1]), "=c" (p[2]), "=d" (p[3])
 113                          :  "0" (ax));
 114 }
 115
 116 static __inline void
 117 cpuid_count(u_int ax, u_int cx, u_int *p)
 118 {
 119         __asm __volatile("cpuid"
 120                          : "=a" (p[0]), "=b" (p[1]), "=c" (p[2]), "=d" (p[3])
 121                          :  "0" (ax), "c" (cx));
 122 }
 123
 124 static __inline void
 125 enable_intr(void)
 126 {
 127         __asm __volatile("sti");
 128 }
 129
 130 #ifdef _KERNEL
 131
 132 #define HAVE_INLINE_FFS
 133 #define        ffs(x)  __builtin_ffs(x)
 134
 135 #define HAVE_INLINE_FFSL
 136
 137 static __inline int
 138 ffsl(long mask)
 139 {
 140         return (mask == 0 ? mask : (int)bsfq((u_long)mask) + 1);
 141 }
 142
 143 #define HAVE_INLINE_FLS
 144
 145 static __inline int
 146 fls(int mask)
 147 {
 148         return (mask == 0 ? mask : (int)bsrl((u_int)mask) + 1);
 149 }
 150
 151 #define HAVE_INLINE_FLSL
 152
 153 static __inline int
 154 flsl(long mask)
 155 {
 156         return (mask == 0 ? mask : (int)bsrq((u_long)mask) + 1);
 157 }
 158
 159 #endif /* _KERNEL */
 160
 161 static __inline void
 162 halt(void)
 163 {
 164         __asm __volatile("hlt");
 165 }
 166
 167 #if !defined(__GNUCLIKE_BUILTIN_CONSTANT_P) || __GNUCLIKE_ASM < 3
 168
 169 #define inb(port)               inbv(port)
 170 #define outb(port, data)        outbv(port, data)
 171
 172 #else /* __GNUCLIKE_BUILTIN_CONSTANT_P && __GNUCLIKE_ASM >= 3 */
 173
 174 /*
 175  * The following complications are to get around gcc not having a
 176  * constraint letter for the range 0..255.  We still put "d" in the
 177  * constraint because "i" isn't a valid constraint when the port
 178  * isn't constant.  This only matters for -O0 because otherwise
 179  * the non-working version gets optimized away.
 180  *
 181  * Use an expression-statement instead of a conditional expression
 182  * because gcc-2.6.0 would promote the operands of the conditional
 183  * and produce poor code for "if ((inb(var) & const1) == const2)".
 184  *
 185  * The unnecessary test `(port) < 0x10000' is to generate a warning if
 186  * the `port' has type u_short or smaller.  Such types are pessimal.
 187  * This actually only works for signed types.  The range check is
 188  * careful to avoid generating warnings.
 189  */
 190 #define inb(port) __extension__ ({                                      \
 191         u_char  _data;                                                  \
 192         if (__builtin_constant_p(port) && ((port) & 0xffff) < 0x100     \
 193             && (port) < 0x10000)                                        \
 194                 _data = inbc(port);                                     \
 195         else                                                            \
 196                 _data = inbv(port);                                     \
 197         _data; })
 198
 199 #define outb(port, data) (                                              \
 200         __builtin_constant_p(port) && ((port) & 0xffff) < 0x100         \
 201         && (port) < 0x10000                                             \
 202         ? outbc(port, data) : outbv(port, data))
 203
 204 static __inline u_char
 205 inbc(u_int port)
 206 {
 207         u_char  data;
 208
 209         __asm __volatile("inb %1,%0" : "=a" (data) : "id" ((u_short)(port)));
 210         return (data);
 211 }
 212
 213 static __inline void
 214 outbc(u_int port, u_char data)
 215 {
 216         __asm __volatile("outb %0,%1" : : "a" (data), "id" ((u_short)(port)));
 217 }
 218
 219 #endif /* __GNUCLIKE_BUILTIN_CONSTANT_P  && __GNUCLIKE_ASM >= 3*/
 220
 221 static __inline u_char
 222 inbv(u_int port)
 223 {
 224         u_char  data;
 225         /*
 226          * We use %%dx and not %1 here because i/o is done at %dx and not at
 227          * %edx, while gcc generates inferior code (movw instead of movl)
 228          * if we tell it to load (u_short) port.
 229          */
 230         __asm __volatile("inb %%dx,%0" : "=a" (data) : "d" (port));
 231         return (data);
 232 }
 233
 234 static __inline u_int
 235 inl(u_int port)
 236 {
 237         u_int   data;
 238
 239         __asm __volatile("inl %%dx,%0" : "=a" (data) : "d" (port));
 240         return (data);
 241 }
 242
 243 static __inline void
 244 insb(u_int port, void *addr, size_t cnt)
 245 {
 246         __asm __volatile("cld; rep; insb"
 247                          : "+D" (addr), "+c" (cnt)
 248                          : "d" (port)
 249                          : "memory");
 250 }
 251
 252 static __inline void
 253 insw(u_int port, void *addr, size_t cnt)
 254 {
 255         __asm __volatile("cld; rep; insw"
 256                          : "+D" (addr), "+c" (cnt)
 257                          : "d" (port)
 258                          : "memory");
 259 }
 260
 261 static __inline void
 262 insl(u_int port, void *addr, size_t cnt)
 263 {
 264         __asm __volatile("cld; rep; insl"
 265                          : "+D" (addr), "+c" (cnt)
 266                          : "d" (port)
 267                          : "memory");
 268 }
 269
 270 static __inline void
 271 invd(void)
 272 {
 273         __asm __volatile("invd");
 274 }
 275
 276 static __inline u_short
 277 inw(u_int port)
 278 {
 279         u_short data;
 280
 281         __asm __volatile("inw %%dx,%0" : "=a" (data) : "d" (port));
 282         return (data);
 283 }
 284
 285 static __inline void
 286 outbv(u_int port, u_char data)
 287 {
 288         u_char  al;
 289         /*
 290          * Use an unnecessary assignment to help gcc's register allocator.
 291          * This make a large difference for gcc-1.40 and a tiny difference
 292          * for gcc-2.6.0.  For gcc-1.40, al had to be ``asm("ax")'' for
 293          * best results.  gcc-2.6.0 can't handle this.
 294          */
 295         al = data;
 296         __asm __volatile("outb %0,%%dx" : : "a" (al), "d" (port));
 297 }
 298
 299 static __inline void
 300 outl(u_int port, u_int data)
 301 {
 302         /*
 303          * outl() and outw() aren't used much so we haven't looked at
 304          * possible micro-optimizations such as the unnecessary
 305          * assignment for them.
 306          */
 307         __asm __volatile("outl %0,%%dx" : : "a" (data), "d" (port));
 308 }
 309
 310 static __inline void
 311 outsb(u_int port, const void *addr, size_t cnt)
 312 {
 313         __asm __volatile("cld; rep; outsb"
 314                          : "+S" (addr), "+c" (cnt)
 315                          : "d" (port));
 316 }
 317
 318 static __inline void
 319 outsw(u_int port, const void *addr, size_t cnt)
 320 {
 321         __asm __volatile("cld; rep; outsw"
 322                          : "+S" (addr), "+c" (cnt)
 323                          : "d" (port));
 324 }
 325
 326 static __inline void
 327 outsl(u_int port, const void *addr, size_t cnt)
 328 {
 329         __asm __volatile("cld; rep; outsl"
 330                          : "+S" (addr), "+c" (cnt)
 331                          : "d" (port));
 332 }
 333
 334 static __inline void
 335 outw(u_int port, u_short data)
 336 {
 337         __asm __volatile("outw %0,%%dx" : : "a" (data), "d" (port));
 338 }
 339
 340 static __inline void
 341 ia32_pause(void)
 342 {
 343         __asm __volatile("pause");
 344 }
 345
 346 static __inline u_long
 347 read_rflags(void)
 348 {
 349         u_long  rf;
 350
 351         __asm __volatile("pushfq; popq %0" : "=r" (rf));
 352         return (rf);
 353 }
 354
 355 static __inline u_int64_t
 356 rdmsr(u_int msr)
 357 {
 358         u_int32_t low, high;
 359
 360         __asm __volatile("rdmsr" : "=a" (low), "=d" (high) : "c" (msr));
 361         return (low | ((u_int64_t)high << 32));
 362 }
 363
 364 static __inline u_int64_t
 365 rdpmc(u_int pmc)
 366 {
 367         u_int32_t low, high;
 368
 369         __asm __volatile("rdpmc" : "=a" (low), "=d" (high) : "c" (pmc));
 370         return (low | ((u_int64_t)high << 32));
 371 }
 372
 373 static __inline u_int64_t
 374 rdtsc(void)
 375 {
 376         u_int32_t low, high;
 377
 378         __asm __volatile("rdtsc" : "=a" (low), "=d" (high));
 379         return (low | ((u_int64_t)high << 32));
 380 }
 381
 382 static __inline void
 383 wbinvd(void)
 384 {
 385         __asm __volatile("wbinvd");
 386 }
 387
 388 static __inline void
 389 write_rflags(u_long rf)
 390 {
 391         __asm __volatile("pushq %0;  popfq" : : "r" (rf));
 392 }
 393
 394 static __inline void
 395 wrmsr(u_int msr, u_int64_t newval)
 396 {
 397         u_int32_t low, high;
 398
 399         low = newval;
 400         high = newval >> 32;
 401         __asm __volatile("wrmsr" : : "a" (low), "d" (high), "c" (msr));
 402 }
 403
 404 static __inline void
 405 load_cr0(u_long data)
 406 {
 407
 408         __asm __volatile("movq %0,%%cr0" : : "r" (data));
 409 }
 410
 411 static __inline u_long
 412 rcr0(void)
 413 {
 414         u_long  data;
 415
 416         __asm __volatile("movq %%cr0,%0" : "=r" (data));
 417         return (data);
 418 }
 419
 420 static __inline u_long
 421 rcr2(void)
 422 {
 423         u_long  data;
 424
 425         __asm __volatile("movq %%cr2,%0" : "=r" (data));
 426         return (data);
 427 }
 428
 429 static __inline void
 430 load_cr3(u_long data)
 431 {
 432
 433         __asm __volatile("movq %0,%%cr3" : : "r" (data) : "memory");
 434 }
 435
 436 static __inline u_long
 437 rcr3(void)
 438 {
 439         u_long  data;
 440
 441         __asm __volatile("movq %%cr3,%0" : "=r" (data));
 442         return (data);
 443 }
 444
 445 static __inline void
 446 load_cr4(u_long data)
 447 {
 448         __asm __volatile("movq %0,%%cr4" : : "r" (data));
 449 }
 450
 451 static __inline u_long
 452 rcr4(void)
 453 {
 454         u_long  data;
 455
 456         __asm __volatile("movq %%cr4,%0" : "=r" (data));
 457         return (data);
 458 }
 459
 460 /*
 461  * Global TLB flush (except for thise for pages marked PG_G)
 462  */
 463 static __inline void
 464 invltlb(void)
 465 {
 466
 467         load_cr3(rcr3());
 468 }
 469
 470 /*
 471  * TLB flush for an individual page (even if it has PG_G).
 472  * Only works on 486+ CPUs (i386 does not have PG_G).
 473  */
 474 static __inline void
 475 invlpg(u_long addr)
 476 {
 477
 478         __asm __volatile("invlpg %0" : : "m" (*(char *)addr) : "memory");
 479 }
 480
 481 static __inline u_int
 482 rfs(void)
 483 {
 484         u_int sel;
 485         __asm __volatile("movl %%fs,%0" : "=rm" (sel));
 486         return (sel);
 487 }
 488
 489 static __inline u_int
 490 rgs(void)
 491 {
 492         u_int sel;
 493         __asm __volatile("movl %%gs,%0" : "=rm" (sel));
 494         return (sel);
 495 }
 496
 497 static __inline u_int
 498 rss(void)
 499 {
 500         u_int sel;
 501         __asm __volatile("movl %%ss,%0" : "=rm" (sel));
 502         return (sel);
 503 }
 504
 505 static __inline void
 506 load_ds(u_int sel)
 507 {
 508         __asm __volatile("movl %0,%%ds" : : "rm" (sel));
 509 }
 510
 511 static __inline void
 512 load_es(u_int sel)
 513 {
 514         __asm __volatile("movl %0,%%es" : : "rm" (sel));
 515 }
 516
 517 static inline void
 518 cpu_monitor(const void *addr, int extensions, int hints)
 519 {
 520         __asm __volatile("monitor;"
 521             : :"a" (addr), "c" (extensions), "d"(hints));
 522 }
 523
 524 static inline void
 525 cpu_mwait(int extensions, int hints)
 526 {
 527         __asm __volatile("mwait;" : :"a" (hints), "c" (extensions));
 528 }
 529
 530 #ifdef _KERNEL
 531 /* This is defined in <machine/specialreg.h> but is too painful to get to */
 532 #ifndef MSR_FSBASE
 533 #define MSR_FSBASE      0xc0000100
 534 #endif
 535 static __inline void
 536 load_fs(u_int sel)
 537 {
 538         register u_int32_t fsbase __asm("ecx");
 539
 540         /* Preserve the fsbase value across the selector load */
 541         fsbase = MSR_FSBASE;
 542         __asm __volatile("rdmsr; movl %0,%%fs; wrmsr"
 543             : : "rm" (sel), "c" (fsbase) : "eax", "edx");
 544 }
 545
 546 #ifndef MSR_GSBASE
 547 #define MSR_GSBASE      0xc0000101
 548 #endif
 549 static __inline void
 550 load_gs(u_int sel)
 551 {
 552         register u_int32_t gsbase __asm("ecx");
 553
 554         /*
 555          * Preserve the gsbase value across the selector load.
 556          * Note that we have to disable interrupts because the gsbase
 557          * being trashed happens to be the kernel gsbase at the time.
 558          */
 559         gsbase = MSR_GSBASE;
 560         __asm __volatile("pushfq; cli; rdmsr; movl %0,%%gs; wrmsr; popfq"
 561             : : "rm" (sel), "c" (gsbase) : "eax", "edx");
 562 }
 563 #else
 564 /* Usable by userland */
 565 static __inline void
 566 load_fs(u_int sel)
 567 {
 568         __asm __volatile("movl %0,%%fs" : : "rm" (sel));
 569 }
 570
 571 static __inline void
 572 load_gs(u_int sel)
 573 {
 574         __asm __volatile("movl %0,%%gs" : : "rm" (sel));
 575 }
 576 #endif
 577
 578 static __inline void
 579 lidt(struct region_descriptor *addr)
 580 {
 581         __asm __volatile("lidt (%0)" : : "r" (addr));
 582 }
 583
 584 static __inline u_short
 585 rldt(void)
 586 {
 587         u_short ldt;
 588         __asm __volatile("sldt %0" : "=g" (ldt));
 589         return (ldt);
 590 }
 591
 592 static __inline void
 593 lldt(u_short sel)
 594 {
 595         __asm __volatile("lldt %0" : : "r" (sel));
 596 }
 597
 598 static __inline void
 599 ltr(u_short sel)
 600 {
 601         __asm __volatile("ltr %0" : : "r" (sel));
 602 }
 603
 604 static __inline u_int64_t
 605 rdr0(void)
 606 {
 607         u_int64_t data;
 608         __asm __volatile("movq %%dr0,%0" : "=r" (data));
 609         return (data);
 610 }
 611
 612 static __inline void
 613 load_dr0(u_int64_t dr0)
 614 {
 615         __asm __volatile("movq %0,%%dr0" : : "r" (dr0));
 616 }
 617
 618 static __inline u_int64_t
 619 rdr1(void)
 620 {
 621         u_int64_t data;
 622         __asm __volatile("movq %%dr1,%0" : "=r" (data));
 623         return (data);
 624 }
 625
 626 static __inline void
 627 load_dr1(u_int64_t dr1)
 628 {
 629         __asm __volatile("movq %0,%%dr1" : : "r" (dr1));
 630 }
 631
 632 static __inline u_int64_t
 633 rdr2(void)
 634 {
 635         u_int64_t data;
 636         __asm __volatile("movq %%dr2,%0" : "=r" (data));
 637         return (data);
 638 }
 639
 640 static __inline void
 641 load_dr2(u_int64_t dr2)
 642 {
 643         __asm __volatile("movq %0,%%dr2" : : "r" (dr2));
 644 }
 645
 646 static __inline u_int64_t
 647 rdr3(void)
 648 {
 649         u_int64_t data;
 650         __asm __volatile("movq %%dr3,%0" : "=r" (data));
 651         return (data);
 652 }
 653
 654 static __inline void
 655 load_dr3(u_int64_t dr3)
 656 {
 657         __asm __volatile("movq %0,%%dr3" : : "r" (dr3));
 658 }
 659
 660 static __inline u_int64_t
 661 rdr4(void)
 662 {
 663         u_int64_t data;
 664         __asm __volatile("movq %%dr4,%0" : "=r" (data));
 665         return (data);
 666 }
 667
 668 static __inline void
 669 load_dr4(u_int64_t dr4)
 670 {
 671         __asm __volatile("movq %0,%%dr4" : : "r" (dr4));
 672 }
 673
 674 static __inline u_int64_t
 675 rdr5(void)
 676 {
 677         u_int64_t data;
 678         __asm __volatile("movq %%dr5,%0" : "=r" (data));
 679         return (data);
 680 }
 681
 682 static __inline void
 683 load_dr5(u_int64_t dr5)
 684 {
 685         __asm __volatile("movq %0,%%dr5" : : "r" (dr5));
 686 }
 687
 688 static __inline u_int64_t
 689 rdr6(void)
 690 {
 691         u_int64_t data;
 692         __asm __volatile("movq %%dr6,%0" : "=r" (data));
 693         return (data);
 694 }
 695
 696 static __inline void
 697 load_dr6(u_int64_t dr6)
 698 {
 699         __asm __volatile("movq %0,%%dr6" : : "r" (dr6));
 700 }
 701
 702 static __inline u_int64_t
 703 rdr7(void)
 704 {
 705         u_int64_t data;
 706         __asm __volatile("movq %%dr7,%0" : "=r" (data));
 707         return (data);
 708 }
 709
 710 static __inline void
 711 load_dr7(u_int64_t dr7)
 712 {
 713         __asm __volatile("movq %0,%%dr7" : : "r" (dr7));
 714 }
 715
 716 static __inline register_t
 717 intr_disable(void)
 718 {
 719         register_t rflags;
 720
 721         rflags = read_rflags();
 722         disable_intr();
 723         return (rflags);
 724 }
 725
 726 static __inline void
 727 intr_restore(register_t rflags)
 728 {
 729         write_rflags(rflags);
 730 }
 731
 732 #else /* !(__GNUCLIKE_ASM && __CC_SUPPORTS___INLINE) */
 733
 734 int     breakpoint(void);
 735 u_int   bsfl(u_int mask);
 736 u_int   bsrl(u_int mask);
 737 void    disable_intr(void);
 738 void    do_cpuid(u_int ax, u_int *p);
 739 void    enable_intr(void);
 740 void    halt(void);
 741 void    ia32_pause(void);
 742 u_char  inb(u_int port);
 743 u_int   inl(u_int port);
 744 void    insb(u_int port, void *addr, size_t cnt);
 745 void    insl(u_int port, void *addr, size_t cnt);
 746 void    insw(u_int port, void *addr, size_t cnt);
 747 register_t      intr_disable(void);
 748 void    intr_restore(register_t rf);
 749 void    invd(void);
 750 void    invlpg(u_int addr);
 751 void    invltlb(void);
 752 u_short inw(u_int port);
 753 void    lidt(struct region_descriptor *addr);
 754 void    lldt(u_short sel);
 755 void    load_cr0(u_long cr0);
 756 void    load_cr3(u_long cr3);
 757 void    load_cr4(u_long cr4);
 758 void    load_dr0(u_int64_t dr0);
 759 void    load_dr1(u_int64_t dr1);
 760 void    load_dr2(u_int64_t dr2);
 761 void    load_dr3(u_int64_t dr3);
 762 void    load_dr4(u_int64_t dr4);
 763 void    load_dr5(u_int64_t dr5);
 764 void    load_dr6(u_int64_t dr6);
 765 void    load_dr7(u_int64_t dr7);
 766 void    load_fs(u_int sel);
 767 void    load_gs(u_int sel);
 768 void    ltr(u_short sel);
 769 void    outb(u_int port, u_char data);
 770 void    outl(u_int port, u_int data);
 771 void    outsb(u_int port, const void *addr, size_t cnt);
 772 void    outsl(u_int port, const void *addr, size_t cnt);
 773 void    outsw(u_int port, const void *addr, size_t cnt);
 774 void    outw(u_int port, u_short data);
 775 u_long  rcr0(void);
 776 u_long  rcr2(void);
 777 u_long  rcr3(void);
 778 u_long  rcr4(void);
 779 u_int64_t rdmsr(u_int msr);
 780 u_int64_t rdpmc(u_int pmc);
 781 u_int64_t rdr0(void);
 782 u_int64_t rdr1(void);
 783 u_int64_t rdr2(void);
 784 u_int64_t rdr3(void);
 785 u_int64_t rdr4(void);
 786 u_int64_t rdr5(void);
 787 u_int64_t rdr6(void);
 788 u_int64_t rdr7(void);
 789 u_int64_t rdtsc(void);
 790 u_int   read_rflags(void);
 791 u_int   rfs(void);
 792 u_int   rgs(void);
 793 void    wbinvd(void);
 794 void    write_rflags(u_int rf);
 795 void    wrmsr(u_int msr, u_int64_t newval);
 796
 797 #endif  /* __GNUCLIKE_ASM && __CC_SUPPORTS___INLINE */
 798
 799 void    reset_dbregs(void);
 800
 801 #ifdef _KERNEL
 802 int     rdmsr_safe(u_int msr, uint64_t *val);
 803 int     wrmsr_safe(u_int msr, uint64_t newval);
 804 #endif
 805
 806 #endif /* !_MACHINE_CPUFUNC_H_ */